我的stm32f405rgt6的dma串口通信代碼

ID:889554 · 發表于 2021-3-8 15:14

這是我前幾天寫的dma串口發送數據的代碼，已經與上位機通信驗證過正確性，可以直接使用。我提供.c和.h代碼

歡迎大家使用。

單片機源程序如下:

#include "main.h"
char SendToPC_Buff[6];
int i;
void vUart4Config(void)
{
USART_InitTypeDef uart4;
GPIO_InitTypeDef gpio;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4,ENABLE);
GPIO_PinAFConfig(GPIOC,GPIO_PinSource10,GPIO_AF_UART4);
GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_UART4);
/* all AF_PP? */
gpio.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
gpio.GPIO_Mode = GPIO_Mode_AF;
gpio.GPIO_OType = GPIO_OType_PP;
gpio.GPIO_Speed = GPIO_Speed_100MHz;
gpio.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOC,&gpio);
uart4.USART_BaudRate = 115200;
uart4.USART_WordLength = USART_WordLength_8b;
uart4.USART_StopBits = USART_StopBits_1;
uart4.USART_Parity = USART_Parity_No;
uart4.USART_Mode = USART_Mode_Tx|USART_Mode_Rx;
uart4.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_Init(UART4,&uart4);
USART_ITConfig(UART4,USART_IT_IDLE,ENABLE);
USART_Cmd(UART4,ENABLE);
USART_DMACmd(UART4,USART_DMAReq_Rx,ENABLE);
USART_DMACmd(UART4,USART_DMAReq_Tx,ENABLE);
{ /* send dma */
DMA_InitTypeDef dma;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1,ENABLE);
DMA_DeInit(DMA1_Stream4);
dma.DMA_Channel= DMA_Channel_4;
dma.DMA_PeripheralBaseAddr = (uint32_t)&(UART4->DR);
dma.DMA_Memory0BaseAddr = (uint32_t)SendToPC_Buff;
dma.DMA_DIR = DMA_DIR_MemoryToPeripheral;
dma.DMA_BufferSize = 6;
dma.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
dma.DMA_MemoryInc = DMA_MemoryInc_Enable;
dma.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
dma.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
dma.DMA_Mode = DMA_Mode_Circular;
dma.DMA_Priority = DMA_Priority_VeryHigh;
dma.DMA_FIFOMode = DMA_FIFOMode_Disable;
dma.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull;
dma.DMA_MemoryBurst = DMA_Mode_Normal;
dma.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA1_Stream4,&dma);
DMA_ITConfig(DMA1_Stream4,DMA_IT_TC,ENABLE);
DMA_Cmd(DMA1_Stream4,DISABLE);
}
}
void UART4_IRQHandler(void)
{
if (USART_GetITStatus(UART4, USART_IT_IDLE) != RESET)
{
(void)UART4->SR;
(void)UART4->DR;
}
}
/* UART4 send interrupt for PC */
void DMA1_Stream4_IRQHandler(void)
{
if(DMA_GetFlagStatus(DMA1_Stream4, DMA_IT_TCIF4) == SET)
{
DMA_Cmd(DMA1_Stream4, DISABLE);
DMA_SetCurrDataCounter(DMA1_Stream4, 6);
DMA_ClearFlag(DMA1_Stream4, DMA_FLAG_TCIF4);
DMA_ClearITPendingBit(DMA1_Stream4, DMA_IT_TCIF4);
}
}
void SendData(void)
{
SendToPC_Buff[0]=0x01;
SendToPC_Buff[1]=0x02;
SendToPC_Buff[2]=0x03;
SendToPC_Buff[3]=0x04;
SendToPC_Buff[4]=0x05;
SendToPC_Buff[5]=0x06;
DMA_Cmd(DMA1_Stream4, ENABLE);
}
int main()
{
vUart4Config();
while(1)
{
i++;
SendData();
}
}

復制代碼

以上資料51hei提供下載:

User.7z (1.21 KB, 下載次數: 27)

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我的stm32f405rgt6的dma串口通信代碼

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